Gaia Data Release 2: Catalogue validation

The second Gaia data release (DR2), contains very precise astrometric and photometric properties for more than one billion sources, astrophysical parameters for dozens of millions, radial velocities for millions, variability information for half a million of stellar sources and orbits for thousands...

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Autores: Gaia Collaboration, Luri Carrascoso, Xavier, Cantat Gaudin, Tristan, Fabricius, Claus, Jordi i Nebot, Carme, Soria Nieto, Sergio, Romero Gómez, Mercè, Antoja, T. (Teresa)
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/140537
Acceso en línea:https://hdl.handle.net/2445/140537
Access Level:acceso abierto
Palabra clave:Astrometria
Catàlegs d'estels
Estels
Asteroides
Astrometry
Star catalogs
Stars
Asteroids
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spelling Gaia Data Release 2: Catalogue validationGaia CollaborationLuri Carrascoso, XavierCantat Gaudin, TristanFabricius, ClausJordi i Nebot, CarmeSoria Nieto, SergioRomero Gómez, MercèAntoja, T. (Teresa)AstrometriaCatàlegs d'estelsEstelsAsteroidesAstrometryStar catalogsStarsAsteroidsThe second Gaia data release (DR2), contains very precise astrometric and photometric properties for more than one billion sources, astrophysical parameters for dozens of millions, radial velocities for millions, variability information for half a million of stellar sources and orbits for thousands of solar system objects. Before the Catalogue publication, these data have undergone dedicated validation processes. The goal of this paper is to describe the validation results in terms of completeness, accuracy and precision of the various Gaia DR2 data. The validation processes include a systematic analysis of the Catalogue content to detect anomalies, either individual errors or statistical properties, using statistical analysis, and comparisons to external data or to models. Although the astrometric, photometric and spectroscopic data are of unprecedented quality and quantity, it is shown that the data cannot be used without a dedicated attention to the limitations described here, in the Catalogue documentation and in accompanying papers. A particular emphasis is put on the caveats for the statistical use of the data in scientific exploitation.EDP Sciences2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/140537Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1051/0004-6361/201833234Astronomy & Astrophysics, 2018, vol. 616, num. A17https://doi.org/10.1051/0004-6361/201833234info:eu-repo/grantAgreement/EC/FP7/606740(c) The European Southern Observatory (ESO), 2018info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1405372026-05-27T06:46:51Z
dc.title.none.fl_str_mv Gaia Data Release 2: Catalogue validation
title Gaia Data Release 2: Catalogue validation
spellingShingle Gaia Data Release 2: Catalogue validation
Gaia Collaboration
Astrometria
Catàlegs d'estels
Estels
Asteroides
Astrometry
Star catalogs
Stars
Asteroids
title_short Gaia Data Release 2: Catalogue validation
title_full Gaia Data Release 2: Catalogue validation
title_fullStr Gaia Data Release 2: Catalogue validation
title_full_unstemmed Gaia Data Release 2: Catalogue validation
title_sort Gaia Data Release 2: Catalogue validation
dc.creator.none.fl_str_mv Gaia Collaboration
Luri Carrascoso, Xavier
Cantat Gaudin, Tristan
Fabricius, Claus
Jordi i Nebot, Carme
Soria Nieto, Sergio
Romero Gómez, Mercè
Antoja, T. (Teresa)
author Gaia Collaboration
author_facet Gaia Collaboration
Luri Carrascoso, Xavier
Cantat Gaudin, Tristan
Fabricius, Claus
Jordi i Nebot, Carme
Soria Nieto, Sergio
Romero Gómez, Mercè
Antoja, T. (Teresa)
author_role author
author2 Luri Carrascoso, Xavier
Cantat Gaudin, Tristan
Fabricius, Claus
Jordi i Nebot, Carme
Soria Nieto, Sergio
Romero Gómez, Mercè
Antoja, T. (Teresa)
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Astrometria
Catàlegs d'estels
Estels
Asteroides
Astrometry
Star catalogs
Stars
Asteroids
topic Astrometria
Catàlegs d'estels
Estels
Asteroides
Astrometry
Star catalogs
Stars
Asteroids
description The second Gaia data release (DR2), contains very precise astrometric and photometric properties for more than one billion sources, astrophysical parameters for dozens of millions, radial velocities for millions, variability information for half a million of stellar sources and orbits for thousands of solar system objects. Before the Catalogue publication, these data have undergone dedicated validation processes. The goal of this paper is to describe the validation results in terms of completeness, accuracy and precision of the various Gaia DR2 data. The validation processes include a systematic analysis of the Catalogue content to detect anomalies, either individual errors or statistical properties, using statistical analysis, and comparisons to external data or to models. Although the astrometric, photometric and spectroscopic data are of unprecedented quality and quantity, it is shown that the data cannot be used without a dedicated attention to the limitations described here, in the Catalogue documentation and in accompanying papers. A particular emphasis is put on the caveats for the statistical use of the data in scientific exploitation.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/140537
url https://hdl.handle.net/2445/140537
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1051/0004-6361/201833234
Astronomy & Astrophysics, 2018, vol. 616, num. A17
https://doi.org/10.1051/0004-6361/201833234
info:eu-repo/grantAgreement/EC/FP7/606740
dc.rights.none.fl_str_mv (c) The European Southern Observatory (ESO), 2018
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The European Southern Observatory (ESO), 2018
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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